One period of a sine or cosine function is called one wave of the sine or cosine curve.
The sine and cosine functions are periodic, meaning they repeat their values in regular intervals. The length of one complete cycle is termed a ‘period’. In trigonometric functions, this period represents the interval over which the function completes one full oscillation – from peak to trough and back again. For the sine and cosine functions, this period is typically 2π radians, which corresponds to 360 degrees.